Ezra 6:19

The [former] exiles kept the Passover on the fourteenth [day] of the first month.

Exodus 12:6-36

You shall keep it until the fourteenth day of the same month, then the whole assembly of the congregation of Israel is to slaughter it at twilight.

Joshua 5:10

While the Israelites camped at Gilgal they observed the Passover on the evening of the fourteenth day of the month on the desert plains of Jericho.

2 Chronicles 30:1-27

Hezekiah sent word to all Israel and to Judah and also wrote letters to Ephraim and Manasseh to come to the house of the Lord at Jerusalem to celebrate the Passover Feast to the Lord God of Israel.

Treasury of Scripture Knowledge

Summary

And the children of the captivity kept the passover upon the fourteenth day of the first month.

Bible References

Kept

Exodus 12:6
You shall keep it until the fourteenth day of the same month, then the whole assembly of the congregation of Israel is to slaughter it at twilight.
Joshua 5:10
While the Israelites camped at Gilgal they observed the Passover on the evening of the fourteenth day of the month on the desert plains of Jericho.